var postLocation="pgbar.php";

function get_extension(filename) {
		var dot = filename.lastIndexOf(".");
		if( dot == -1 ) return "";
		var extension = filename.substr(dot,filename.length);
		return extension.toLowerCase();
}

function check_types() {
	var extensie = get_extension(document.forms[0].file.value);
	if (extensie != ".jpg")
	{
		alert('Sorry, ' + extensie + '-bestanden zijn niet toegestaan.\nSelecteer een .jpg-bestand.');
		return false;
	}
	return true;
}

function popUP(mypage, myname, w, h, scroll, titlebar)
{

	var winl = (screen.width - w) / 2;
	var wint = (screen.height - h) / 2;
	winprops = 'height='+h+',width='+w+',top='+wint+',left='+winl+',scrollbars='+scroll+',resizable'
	win = window.open(mypage, myname, winprops)
	if (parseInt(navigator.appVersion) >= 4) {
		win.window.focus();
	}
}

function postIt()
{
	if(check_types() == false)
	{
		return false;
	}
	baseUrl = postLocation;
	sid = document.forms[0].sessionid.value;
	iTotal = escape("-1");
	baseUrl += "?iTotal=" + iTotal;
	baseUrl += "&iRead=0";
	baseUrl += "&iStatus=1";
	baseUrl += "&sessionid=" + sid;

	popUP(baseUrl,"Uploader",320,180,false,false);
	document.forms[0].submit();
}

function showProgress()
{
	baseUrl = postLocation;
	sid = document.forms[0].sessionid.value;
	iTotal = escape("-1");
	baseUrl += "?iTotal=" + iTotal;
	baseUrl += "&iRead=0";
	baseUrl += "&iStatus=1";
	baseUrl += "&sessionid=" + sid;

	popUP(baseUrl,"Uploader",320,180,false,false);
}